CN104264088B - A kind of method of utilization electromagnetic field ageing strengthening aluminium alloy - Google Patents
A kind of method of utilization electromagnetic field ageing strengthening aluminium alloy Download PDFInfo
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- CN104264088B CN104264088B CN201410548408.2A CN201410548408A CN104264088B CN 104264088 B CN104264088 B CN 104264088B CN 201410548408 A CN201410548408 A CN 201410548408A CN 104264088 B CN104264088 B CN 104264088B
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Abstract
The invention provides a kind of method of utilization electromagnetic field ageing strengthening aluminium alloy, including step：Aluminium alloy is put in solid solution furnace and carries out solution treatment, take out after insulation；Aluminium alloy after solution treatment is put into and is quenched equipped with the tank of aqueous solution；Aging furnace is warmed up to aging temp, the aluminium alloy after quenching is put in aging furnace, apply alternating magnetic field simultaneously, electromagnetic field Ageing Treatment is carried out to aluminium alloy, until aging time terminates；Alternating magnetic field intensity is 0.04～0.1T；Aging temp is 165～190 DEG C, and aging time is 3～24h.The present invention, by adding, in aluminium alloy Stages of Aging, the alternating magnetic field that intensity is about 0.04～0.1T, shortens the Precipitation time, have impact on form and the quantity of Age-prrcipitation Phase, improves the material mechanical performance after heat treatment to a certain extent；And simple to operation, it is easy to industrialized production and implement.
Description
Technical field
The present invention relates to nonferrous materials electromagnetic field technical field of heat treatment, especially, it is related to one kind and utilizes electromagnetic field
The method of ageing strengthening aluminium alloy.
Background technology
In actual production, extensively improved using age-hardening phenomenon 2 be aluminium copper intensity.According to alloy property
And use requirement, single-stage aging, interrupted aging, strain ageing and recurrence can mainly be included using different conventional aging techniques
Ageing Treatment etc. again.And in recent years, with Chinese scholars, electromagnetic field means are applied to Material Field, and achieve certain one-tenth
Really, its as improve material structure, performance new method progressively cognitive.The electromagnetism solid-state phase changes process study master of metal material
Multiple transition process such as recovery and recrystallization to be included, precipitation, ferrite, pearlite, martensite, bainitic transformation, these turns
Change is likely to affected by magnetic fields.
From the point of view of document, it is currently undertaken by the research of non-ferrous alloy solid-state phase changes precipitated phase precipitation aspect under magnetic field, its
Magnetic signature mostly is steady strong magnetic field.Steady strong magnetic field feature shows as magnetic field by how to be produced by superconduction, and magnetic direction is constant, magnetic
Field intensity 1T (containing) more than.It is below present Research in terms of steady strong magnetic field for the Chinese scholars：
1st, Ren Xiao etc. have studied the impact under steady strong magnetic field, Al-Cu diffusion couple interface mesophase being formed and growing, magnetic
Field intensity is respectively 3T, 5T, it is found that：There occurs change with phase composition in the middle of the increase of magnetic field intensity, and its diffusion coefficient
There is directivity.
2nd, Liu Wanchen etc. has carried out Ageing Treatment to made of Al-Cu alloy, and its institution of prescription is：Magnetic field intensity 10T, aging temp
190 DEG C, aging time 24h, it is indicated that magnetic field improves alloy rigidity, shortens the Precipitation time, increased Grain Boundary Precipitates
Quantity, think and Transformation in Aging diffusion coefficient be increased due to the effect of high-intensity magnetic field.
3rd, the impact that Al-4wt%Cu alloy aging is separated out such as army building is studied recklessly, and magnetic field intensity is 10T, timeliness
130 DEG C of temperature, 190 DEG C through different time Ageing Treatment, it is found that applying the preferred orientation method phase that high-intensity magnetic field result in alloy
Significantly change.
4th, king's grace just etc. have studied the high-intensity magnetic field ageing behavior of Cu-15%Fe alloy, it is found that the Fe content in matrix
Relatively low, show that high-intensity magnetic field promotes precipitation in Cu matrix for the Fe to a certain extent.If carrying out at timeliness more than curie point
During reason, the Fe atom in Cu matrix is paramagnetism, and susceptibility value is little, and the change of the unit volume energy of magnetization is also little；And curie point with
Under when carrying out Ageing Treatment, the Fe atom in Cu matrix is ferromagnetism, and susceptibility increases sharply, and the unit volume energy of magnetization changes relatively
Greatly.For (800 DEG C) when under curie point, during Ageing Treatment, the diffusion coefficient of (500 DEG C) atom is more than curie point above Ageing Treatment
The diffusion coefficient of atom, thus Curie taps Ageing Treatment diffusion comparatively fast, the atom in matrix separates out more.
5th, Liu Xiaopeng etc. have studied Ti in Ti-Ni marmem3Ni4Phase Precipitation and the impact of transformation behavior, magnetic
Field intensity is 5T, 10T, 500 DEG C of aging temp, time 2.5h Ageing Treatment, and tem observation shows, the Ti near crystal boundary3Ni4Separate out
Phase amount is obviously reduced, and traces it to its cause and may hinder the Ni of intra-die and migrate it is suppressed that Ti to around crystal boundary in magnetic field3Ni4Phase
Forming core.
In sum, made of Al-Cu alloy, Fe-Cu alloy high-intensity magnetic field are promoted to the precipitation of the second phase, and Fe-Cu alloy
There is curie point, the Fe that during curie point temperatures above timeliness, the precipitation of Fe atom taps during aging temp less than Curie on the contrary is former
The precipitation of son；High-intensity magnetic field is applied for Ti-Ni alloy and inhibits Ti on the contrary3Ni4The forming core of phase.Steady strong magnetic field is in non-ferrous alloy
Performance in Ageing Treatment is complicated and changeable, and its mechanism of action need to study further, obtains the means of high-intensity magnetic field simultaneously
Also many to be developed by means of superconductor technology, also there are some restrictions at present in terms of industrialization.
Content of the invention
Present invention aim at providing a kind of method of utilization electromagnetic field ageing strengthening aluminium alloy, to solve steady strong magnetic field
It is difficult to obtain, thus affecting the technical problem of industrializing implementation popularization.
For achieving the above object, the invention provides a kind of method of utilization electromagnetic field ageing strengthening aluminium alloy, including with
Lower step：
A, solution treatment：Solid solution furnace is warmed up to solid solubility temperature, aluminium alloy is put in solid solution furnace and is processed, after insulation
Take out；
B, rapid quenching：Aluminium alloy after solution treatment is put into and is quenched equipped with the tank of aqueous solution；
C, ageing strengthening：Aging furnace is warmed up to aging temp, the aluminium alloy after quenching is put in aging furnace, applies simultaneously
Plus alternating magnetic field, electromagnetic field Ageing Treatment is carried out to aluminium alloy, until aging time terminates；Alternating magnetic field intensity be 0.04～
0.1T；Aging temp is 165～190 DEG C, and aging time is 3～24h.
Preferably, the frequency of alternating magnetic field is 0-400Hz.
Preferably, the frequency of alternating magnetic field is 40-60Hz.
Preferably, the quenching shift time in rapid quenching step is less than 30S.
Preferably, alternating magnetic field is single-phase magnetic field.
Preferably, the solid solubility temperature in solutionizing step is 500-545 DEG C, and solid solution temperature retention time is 30～45min.
Preferably, flat aluminium alloy plate and the magnetic line of force are disposed vertically.
The invention has the advantages that：
The present invention, by adding, in aluminium alloy Stages of Aging, the alternating magnetic field that intensity is about 0.04～0.1T, shortens timeliness
The precipitation time, have impact on form and the quantity of Age-prrcipitation Phase, improve the material mechanical performance after heat treatment to a certain extent；
And simple to operation, it is easy to industrialized production and implement.
Ageing strengthening makes the supersaturated solid solution being formed during high temperature solid solution decompose, and separates out with some form, is formed
The precipitated phase of Dispersed precipitate, effectively stops the motion of crystal boundary and dislocation, so that intensity is increased, toughness reduces；The present invention is in aluminium alloy
Stages of Aging adds weak intensity magnetic field, have impact on the motion of Cu atom and room, accelerates the core forming speed of precipitated phase.Due to electricity
Magnetic field reduces the concentration in room in alloy matrix aluminum, also reduces Precipitation phase and continues required driving force when growing up,
Growing up of precipitated phase is caused to be suppressed；Simultaneous timeliness is carried out, timeliness progress faster, the time that precipitated phase is grown up and phase
To shortening, thus the size of precipitated phase is less, and precipitated phase is tiny and disperse (see Fig. 2), thus improve the strong of 2219 aluminium alloys
Degree and hardness.
Therefore, compared with weak intensity electromagnetic field aging strengthening model than normative heat treatment technique to the tissue of aluminium alloy and performance
Improvement becomes apparent from.And, the electromagnetic field of weak intensity is readily obtained, industrialized production convenient to carry out.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is further detailed explanation.
Brief description
The accompanying drawing constituting the part of the application is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the experiment scene structural representation of the preferred embodiment of the present invention；
Fig. 2 is 175 DEG C of timeliness 3h of the preferred embodiment of the present invention, electronic transmission TEM photo, and left side photo is ordinary temperature
Field aging effects, the right photo is magnetic field aging effects；
Wherein, 1, electric magnet, 2, aluminum alloy specimen.
Specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the present invention can limit according to claim
Multitude of different ways that is fixed and covering is implemented.
Referring to Fig. 1, Fig. 2, a kind of method of utilization electromagnetic field ageing strengthening aluminium alloy, comprise the following steps：
A, solution treatment：Solid solution furnace is warmed up to solid solubility temperature, aluminium alloy is put in solid solution furnace and is processed, after insulation
Take out；
Aluminium alloy is immersed in the water cooling rapidly after being heated to 500-545 degree Celsius, makes supersaturated solid solution in ambient-temp-stable
Get off it is therefore an objective to improve intensity and the hardness of aluminium alloy, eliminate the internal stress producing in the course of processing so as to obtain uniform one-tenth
Divide, organize and performance.
B, rapid quenching：Aluminium alloy after solution treatment is put into and is quenched equipped with the tank of aqueous solution；
Quenching shift time, be totally immersed into that hardening media experienced from Solution Treatment Furnace oven door opening to aluminium alloy when
Between.Quenching shift time should be shortened during aluminum alloy quenching as far as possible, to prevent cupric phase from separating out, reduce alloy aging effect.This Shen
Quenching shift time please is less than 30S.
C, ageing strengthening：Aging furnace is warmed up to aging temp, the aluminium alloy after quenching is put in aging furnace, applies simultaneously
Plus alternating magnetic field, electromagnetic field Ageing Treatment is carried out to aluminium alloy, until aging time terminates；Alternating magnetic field intensity be 0.04～
0.1T；Aging temp is 165～190 DEG C, and aging time is 3～24h.
Alternating magnetic field is the magnetic field that alternating current produces, and magnetic direction can change according to certain rule over time, magnetic
Size 0.04～the 0.1T of field intensity refers to the maximum of the magnetic field intensity of alternating magnetic field up to 0.1T, and the magnetic field of alternating magnetic field is strong
The minima of degree is up to 0.04T.Therefore under single-frequency or different frequency magnetic field intensity be 0.04～0.06T, 0.04～
The alternating magnetic field of 0.08T, 0.06～0.08T, 0.06～0.1T or 0.04～0.1T belongs to " alternating magnetic field intensity in the present invention
For 0.04～0.1T " category.
The frequency of alternating magnetic field used herein can be the single-phase magnetic field of 0-400Hz, the preferably single-phase magnetic of 40-60Hz
?.
Specific embodiment is as follows：
The 2219 aluminium alloy flat cold-rolled sheets for 4mm for the thickness are made two groups of tensile sample by HB5143 96.One group is tried
Sample is incubated 45min in 500-545 DEG C of solid solution furnace, quenches rapidly after taking out sample, is then placed in protecting in 175 DEG C of aging furnace
Warm 3h.Another group of sample the first two steps are consistent, but apply alternating magnetic field in aging furnace, and the frequency in magnetic field and intensity are respectively
40-60Hz, 40～100mT.Magnetic direction is as shown in figure 1, be placed across in field of magnetic forece aluminium alloy flat cold-rolled sheet so as to cut
Cut the magnetic line of force.
Then, the sample carrying out carrying out timeliness in magnetic field in timeliness and ordinary temp field is measured respectively, arrange in table 1
After having gone out 175 DEG C of timeliness 3h, temperature field and the tensile strength of sample corresponding to magnetic field, yield strength and elongation after fracture.
Table 1 temperature field timeliness and the impact to tensile mechanical properties for the magnetic field timeliness
| Physical field type | Tensile strength sigma b/MPa | Yield strength σ 0.2/MPa | Elongation after fracture δ/% |
| Magnetic field (40～100mT) | 414 | 330 | 15 |
| Temperature field | 372 | 292 | 17.8 |
As can be seen from Table 1, through magnetic field aging heat treatment sample compared with conventional aging heat treatment probe intensity,
Yield strength and tensile strength all improve, and reason is that magnetic field makes the yardstick of precipitated phase more tiny, improve the spread, Jin Erti
The high intensity of 2219 alloys.
By accompanying drawing 2 as can be seen that through 175 DEG C of timeliness 3h heat treatments, conventional timeliness and magnetic field timeliness all have second mutually to analyse
Go out, precipitated phase assumes mutually perpendicular elongated acicular morphology, however, difference is obvious on yardstick or in the spread.With normal
The sample of rule timeliness is compared, the precipitated phase more small and dispersed (see photo on the right of Fig. 2) of the alloy of magnetic-field heat treatment.TEM studies
Result shows, the average-size of magnetic field Age-prrcipitation Phase is about 50nm, and the average-size of conventional Age-prrcipitation Phase is about
135nm.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (4)
1. a kind of method using electromagnetic field ageing strengthening aluminium alloy is it is characterised in that comprise the following steps：
A, solution treatment：Solid solution furnace is warmed up to solid solubility temperature, aluminium alloy is put in solid solution furnace and is processed, take after insulation
Go out；
B, rapid quenching：Aluminium alloy after solution treatment is put into and is quenched equipped with the tank of aqueous solution；
C, ageing strengthening：Aging furnace is warmed up to aging temp, the aluminium alloy after quenching is put in aging furnace, apply to hand over simultaneously
Varying magnetic field, carries out electromagnetic field Ageing Treatment to aluminium alloy, until aging time terminates；Alternating magnetic field intensity is 0.04～0.06T；
Aging temp is 175～190 DEG C, and aging time is 3～24h, and the frequency of alternating magnetic field is 40Hz；Alternating magnetic field is single-phase magnetic
?.
2. a kind of method using electromagnetic field ageing strengthening aluminium alloy according to claim 1 is it is characterised in that quickly quench
Quenching shift time in fiery step is less than 30s.
3. a kind of method of utilization electromagnetic field ageing strengthening aluminium alloy according to claim 1 is it is characterised in that at solid solution
Solid solubility temperature in reason step is 500-545 DEG C, and solid solution temperature retention time is 30～45min.
4. a kind of method of utilization electromagnetic field ageing strengthening aluminium alloy according to claim 1 is it is characterised in that aluminium alloy
Flat board is disposed vertically with the magnetic line of force.
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| CN108531702A (en) * | 2018-07-02 | 2018-09-14 | 内蒙古科技大学 | Annealing device, method and system for the quick timeliness of aluminium alloy electric magnetic energy |
| CN109680230B (en) * | 2019-02-26 | 2021-01-19 | 武汉理工大学 | Electromagnetic pulse rapid solid solution-aging process for aluminum alloy component |
| CN110714176B (en) * | 2019-11-06 | 2020-12-29 | 天津大学 | Heat treatment method capable of realizing rapid aging of aluminum alloy |
| CN112877630B (en) * | 2021-01-08 | 2022-05-24 | 中南大学 | Method and device for strengthening aluminum alloy member by electromagnetic force room temperature circulation |
| CN115652234B (en) * | 2022-06-12 | 2023-09-01 | 湖南科技大学 | Method for improving stability of aluminum alloy through rolling composite regulation and control |
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| CN1912167A (en) * | 2006-08-10 | 2007-02-14 | 上海交通大学 | High-intensity magnetic field ageing hot processing method of Mg-Al series alloy |
| CN102703772A (en) * | 2012-06-11 | 2012-10-03 | 南昌航空大学 | Method for preparing ZL114A aluminum alloy semi-solid slurry by using pulsed magnet field |
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